<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>天气案例</title>
    <script src="../../JS/vue.js"></script>
  </head>
  <body>
    <div id="root">
      <!-- <h2>今天心情很不好{{isHot ? 炎热 : 凉爽}}</h2> -->
      <h2>今天心情很{{info}}</h2>
      <button @click="changeWeatcher">切换天气</button>
    </div>
    <script>
      Vue.config.productionTip = false //阻止 vue 在启动时产生提示
      const vm = new Vue({
        el: '#root',
        data: {
          isHot: true,
        },
        methods: {
          changeWeatcher() {
            this.isHot = !this.isHot
          },
        },
        computed: {
          info() {
            return this.isHot ? '糟糕' : '高兴'
          },
        },
      })
    </script>
  </body>
</html>
